Method for changing operating mode of wireless LAN system and wireless LAN system
An operating mode change method of a wireless local area network (WLAN) system according to an exemplary embodiment includes transmitting, by a station (STA) to an access point (AP), an operating mode change request frame comprising at least one of information on a change of a traffic indication map (TIM) mode, a request for a change of a power save parameter, and information on a change of a service type of the STA, receiving, from the AP, an operating mode change response frame comprising at least one of a TIM mode allowed by the AP, a reallocated association identification (AID), and information on a changed power save parameter, and performing at least one of the change of the TIM mode and the change of the power save parameter based on the information included in the operating mode change response frame.
1. An operating mode change method of a wireless local area network (WLAN) system, the method comprising:
transmitting, by a station (STA) to an access point (AP), a request frame comprising at least one of information on a change of traffic indication map (TIM) modes, information on a change of a listen interval, or information on a change of a service type of a STA;
receiving, from the AP, a response frame comprising information on an association identification (AID) for the STA allocated by the AP and information on a listen interval for the STA allocated by the AP; and
performing an operation based on the information on the AID included in the response frame,
wherein the change of TIM modes includes a switch from a TIM mode to a non-TIM mode, or a switch from the non-TIM mode to the TIM mode.
2. The method of claim 1 , further comprising receiving, from the AP, an operating mode notification frame comprising information on a change of an operating mode of the AP before the transmitting of the request frame to the AP or after the performing of the change.
3. The method of claim 2 , wherein the operating mode notification frame of the AP comprises information on whether the AP supports all kinds of STAs, supports only a sensor node, or supports only an offloading device.
4. The method of claim 2 , wherein the operating mode notification frame of the AP comprises information on a basic service set (BSS) type supported by the AP, and the BSS type comprises at least one of a sensor mode, an offloading mode, and a mixed mode.
5. The method of claim 1 , wherein the response frame further comprises at least one of an allowed TIM mode, information on a changed listen interval, or information on a group change by the change of the TIM modes.
6. The method of claim 1 , wherein when the STA makes a request for association with the AP, the information included in the request frame is included in the request for association and transmitted to the AP to request setup of an operating mode at a time when the STA is associated with the AP.
7. The method of claim 6 , wherein operating setup request information included in the request for association comprises at least one of a TIM mode desired by the STA, a power save parameter including a sleep duration corresponding to a listen interval or a wakeup interval, or a traffic type or a service type of the STA.
8. The method of claim 1 , wherein when the AP receives an association request including the information included in the request frame from the STA, the AP determines whether to associate with the STA, and transmits an association response including the information included in the response frame to the STA, if association is allowed, so that the STA sets up an operating mode at a time of association.
9. The method of claim 8 , wherein operating setup response information included in the association response comprises at least one of a TIM mode allowed by the AP for the STA, an AID of the STA, or a power save parameter including a sleep duration corresponding to a listen interval or wakeup interval.
10. The method of claim 1 , wherein an AID of the STA is reallocated by the AP, when at least one of the change of TIM modes or the change of the listen interval of the STA is performed at the STA, and
wherein the reallocated AID included in the response frame is used by the STA as a new AID of the STA.
11. The method of claim 1 , wherein the AID of the STA is reallocated by the AP based on the information on the change of the service type of the STA.
12. The method of claim 1 , wherein the performing further includes performing at least one of the change of the TIM modes or the change of the listen interval based on the information included in the response frame.
13. An operating mode change method of a wireless local area network (WLAN) system, the method comprising:
receiving, by an access point (AP) from a station (STA), a request frame comprising at least one of information on a change of traffic indication map (TIM) modes of the STA, information on a change of a listen interval, or information on a change of a service type of the STA; and
transmitting, to the STA, a response frame comprising information on an association identification (AID) for the STA allocated by the AP and information on a listen interval for the STA allocated by the AP,
wherein the change of TIM modes includes a switch from a TIM mode to a non-TIM mode, or a switch from the non-TIM mode to the TIM mode.
14. A station (STA) of a wireless local area network (WLAN) system, the STA comprising:
a transmission unit to transmit, to an access point (AP), a request frame comprising at least one of information on a change of traffic indication map (TIM) modes of the STA, information on a change of a listen interval, or information on a change of a service type of the STA;
a reception unit to receive, from the AP, a response frame comprising information on an association identification (AID) for the STA allocated by the AP and information on a listen interval for the STA allocated by the AP; and
a controller to perform an operation based on the information on the AID included in the response frame,
wherein the change of TIM modes includes a switch from a TIM mode to a non-TIM mode, or a switch from the non-TIM mode to the TIM mode.
15. The STA of claim 14 , wherein the reception unit receives, from the AP, an operating mode notification frame comprising information on a change of an operating mode of the AP before the transmitting of the request frame to the AP or after the performing of the change.
16. The STA of claim 14 , wherein the response frame further comprises at least one of an allowed TIM mode, information on a changed listen interval, or information on a group change by the change of the TIM modes.
17. The STA of claim 14 , wherein the controller is further configured to perform at least one of the change of the TIM modes or the change of the listen interval based on the information included in the response frame.
18. An access point (AP) of a wireless local area network (WLAN) system, the AP comprising:
a reception unit to receive a request frame comprising at least one of information on a change of traffic indication map (TIM) modes of a station (STA), information on a change of a listen interval, or information on a change of a service type of the STA; and
a transmission unit to transmit, to the STA, a response frame comprising information on an association identification (AID) for the STA allocated by the AP and information on a listen interval for the STA allocated by the AP,
wherein the change of TIM modes includes a switch from a TIM mode to a non-TIM mode, or a switch from the non-TIM mode to the TIM mode.